Furnace



No. 6|s,742. Patented Dec. 27, |893. J. A. SNYDER & G. H. HEITZMAN, 1R.FURNAGE.

(Application filed Apr. 8, 1898.) (No Model.)

A TTOR/VEY l@ Jolie/UZ fff f ,s7? ,d L :Es f f A E a@ /f H .fr EMM mw Miwf V FFICE@ Nrrnn STATES JOHN A. SNYDER AND GEORGE Il. IIEITZMAN, JR.,OF PITTSBURG,

PENNSYLVANIA.

FU RNACE.

SPECIFICATION forming part of Letters Patent N o. 616,742, datedDecember 27, 1898.

Application iiled April 8,1898, Serial No. 676,907. (No model.)

.To all whom t may concern:

Be it known that we, JOHN A. SNYDER and GEORGE H. HEITZMAN, Jr.,citizens of the United States of America, residing at Pittsburg, in thecounty of Allegheny and State of Pennsylvania, have invented certain newand useful Improvements in Furnaces, of which the following is aspecication, reference being had therein to the accompanying drawings.

This invention relates to certain new and useful improvements infurnaces; and it relates particularly to a device by means of Whichsteam is projected along the walls of the furnace so as to prevent theaccumulation of cinders or clinkers upon said walls, while at the sametime assisting in the increasing of the draft and promoting a moreperfectcombustion vwithin the combustionchamber. To accomplish theseresults, We arrange beneath the grate-bars of the furnace a perforatedpipe which extends along each wall of the furnace and is connected by asupply-pipe to the dome of the boiler or at another suitable point, sothat live steam may be fed regularly into the said perforated pipe. Onthat portion of the pipe which extends along the front of the furnace wemay provide the same with perforations only in front of the dome, sothat no steam will escape from the pipe at a point adjacent to thefurnace-bars. XVe also prefer to provide the two ends of the perforatedpipe with blow-off cocks, so that in event of the said pipes becomingclogged these cocks may be opened.

and an increased force of steam turned into the perforated pipe, so asto drain the sediment therefrom. Ve Aalso provide the said front pipewith a cook or valve, by means of which the steam may be shut oifentirely from vthis pipe, if desired.

In most furnaces at the present time it is difficult to prevent theaccumulation of elinkers upon the side and bridge walls, and theseclinkers tend to injure thedraft of the furnace, hindering the perfectcombustion of the same, increasing the amount of fuel required to attainthe desired heat, besides largely increasing the labor of ring afurnace, as well as increasing the cost of repairs, as the removal ofthese clinkers necessarily injures the brickwork to a large extent, sothat in a short time it is necessary to repair or replace the same. Toovercome all these objections and to provide a device whereby thegreatest possible combustion of fuel will be obtained, the draft will bestrengthened, the smoke will to a large extent be consumed, a saving ofnre-brick, a saving of labor and repairs, to attain a more easy workingof the firing, to provide a device which will be noiseless in itsoperation, a device which will require but a small amount of space, andwhich may be applied to any furnace and which will be extremely simplein construction are the objects of our invention, and we will now morespeciically describe the same by reference to the accompanying drawings,in which- Figure l is a perspective view of the furnace, partly brokenaway, showing our im- 7o proved fuel-consumer and clinker-remover inposition. Fig. 2 is a top plan view of a por-A tion of a furnace withthe grate-bars partly broken away to show the arrangement of theperforated pipes.

To put our invention into practice, we provide the four pieces of pipect, o, c, and d, said sections o and c being placed in closejuxtaposition to the side wall e of the furnace, the section CZ beingplaced in a similar manner along the bridge-wall f of the furnace, andthe section ct being placed along the front of the furnace or directlyunderneath the grate-bars g. These sections of pipe are or may besecured to the said walls by means of staples t driven into thebrickwork or masonry, or other desirable fastening means may be providedfor same. are connected to the section cl by means of the unions lo,while the said section b at its other end and the section a areconnected by a three-way union Z, to which is also attached thesupply-pipe m, which conducts the -steam from the dome or other sourceof supply to the aforesaid pipes within the furnace. The sections b, o,and d are each provided throughout their length on their upper face withper forations n, which in the pipe d are so arranged that they will bedirectly between each of the grate-bars in order that the latter may Thesections b and c IOO 4front of the furnace-doors.

offer no resistance to the jets of steam emitted through the saidperforations. The pipe or section a may be provided With theseperforations at that portion of the pipe which is in juxtaposition tothe jambs o with the balance of the pipe unperforated, so that no steamwill be projected therefrom directly in If desired, this pipe a may beprovided with a controlling valve or cock p in close relation to theunion Z, so that the steam may be entirely shut off from the pipe Ct ifsuch may be found desirable. We also preferably provide the free end ofthe pipe or section a with a blow-off cock or valve q, and provide thefree end of the pipe or section c with a similar blow-off cock or valver.

To regulate the quantity of steam admitted into the pipes, thesupply-pipe m is provided with a controlling valve or cock m', which maybe arranged in the position shown or at any other desired position uponthe supplypipe.

Vhile the device is herein shown as applied to a Single furnace, itwillof course be readily understood that it can be arranged toaccommodate any number of furnaces, each being fed from the onecommonsupply-pipe. In practice we have found that a very small amount of steamadmitted into the perforated pipes has been suflicient to keep the wallsof the furnace entirely free from clinkers, and thereby tending togreatly increase the combustion within the furnace and decreasing thelabor necessary to retain the desired heat, The obviation of theclinkers accumulating upon the side and bridge walls has also been foundto largely increase the life of the Wall, as the Work of removing theclinkers necessarily damages the walls to a great extent, so that in ashort time it is absolutely necessary to repair or remove the same.

By arranging the pipe that is in juxtaposition to the bridge-wall sothat the perforations will come directly between the gratebars noobstruction is offered to the steam emitted throughsaid pipe.

In case the pipes should accidentally become clogged by sedimentsettling through the apertures thereof the opening of the blowoff cocksto the valve l and the increase of the steam-pressure by opening thevalve ml will permit the ejection of all such sediment from the pipes.We have also found that by such a construction the smoke is, to a greatextent, consumed, as the hot blast from under the grate, passing upthrough the live coals, brings the clear flame into contact with thesmoke when it reaches the bridge-Wall, and thereby causes the same to beconsumed.

Such a device can readily be applied to any form of furnace without inany manner interfering with the ordinary construction of the same.

Having fully described our invention, what We claim as new, and desireto secure by Letters Patent, is-

In combination with a furnace of pipes a, Z2, c and d connected togetherin substantially a rectangular form within the furnace and below thegrate-bars, the pipes a and c having a blow-off cocksecured to theirfree ends, said pipes l), c, d being provided with perforations, atpredetermined distances apart so the same will be opposite the openingsin the grate, a steam-supply pipe secured to an elbow connecting pipes aand l), said pipe a being provided with perforations at a central point,and a Valve for regulating the supply of steam, substantially as shownand described.

In testimony whereof We affix our signatures in lthe presence of twoWitnesses.

JOHN A. SNYDER. GEORGE H. HEITZMAN, JR.

lVitnesses:

A. M. WILSON, JOHN GROETZINGER.

